My Mathematics textbook has 400 pages. The chapter "Ratio and Proportion" covers 12 pages. What is the ratio of the number of pages of this chapter to the total number of pages in the textbook?

12 : 100

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3 : 400

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3 : 100

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1 : 12

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Solution

The correct option is C 3 : 100
Number of pages in the Mathematics textbook = 400

Number of pages covering the chapter "Ratio and Proportion" = 12

$∴$ Ratio of the number of pages of this chapter to the total number of pages in the textbook = $\frac{12}{400}$ = $\frac{3}{100}$

Hence, the ratio is 3: 100.

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Question 5

Only one of the four options is correct. Write the correct one.

Mathematics textbook for class VI has 320 pages. The chapter 'symmetry' runs from page 261 to page 272. The ratio of the number of pages of this chapter to the total number of pages of the book is

a) 11 : 320

b) 3 : 40

c) 3 : 80

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My Mathematics textbook has 400 pages. The chapter "Ratio and Proportion" covers 12 pages. What is the ratio of the number of pages of this chapter to the total number of pages in the textbook?

The correct option is C 3 : 100Number of pages in the Mathematics textbook = 400 Number of pages covering the chapter "Ratio and Proportion" = 12 ∴ Ratio of the number of pages of this chapter to the total number of pages in the textbook = 12400 = 3100 Hence, the ratio is 3: 100.